Dandan Liang, Zeng Li, Guohong Liu et al.

SSRN Electronic Journal • 2022

Shunling Li, Lei Li, Qing Qu et al.

Colloids and Surfaces B: Biointerfaces • 2019

Dewu Ding, Ling Li, Chuanjun Shu et al.

Frontiers in Microbiology • 2016

Shewanella oneidensis MR-1 is capable of extracellular electron transfer (EET) and hence has attracted considerable attention. The EET pathways mainly consist of c-type cytochromes, along with some other proteins involved in electron transfer processes. By whole genome study and protein interactions inquisition, we constructed a large-scale electron transfer network containing 2276 interactions among 454 electron transfer related proteins in S. oneidensis MR-1. Using the k-shell decomposition method, we identified and analyzed distinct parts of the electron transfer network. We found that there was a negative correlation between the k s (k-shell values) and the average DR_100 (disordered regions per 100 amino acids) in every shell, which suggested that disordered regions of proteins played an important role during the formation and extension of the electron transfer network. Furthermore, proteins in the top three shells of the network are mainly located in the cytoplasm and inner membrane; these proteins can be responsible for transfer of electrons into the quinone pool in a wide variety of environmental conditions. In most of the other shells, proteins are broadly located throughout the five cellular compartments (cytoplasm, inner membrane, periplasm, outer membrane, and extracellular), which ensures the important EET ability of S. oneidensis MR-1. Specifically, the fourth shell was responsible for EET and the c-type cytochromes in the remaining shells of the electron transfer network were involved in aiding EET. Taken together, these results show that there are distinct functional parts in the electron transfer network of S. oneidensis MR-1, and the EET processes could achieve high efficiency through cooperation through such an electron transfer network.

Man Chen, Xiaofang Zhou, Xing Liu et al.

Biosensors and Bioelectronics • 2018

The conductivity of a biofilm is the key factor for the high current density of a bioelectrochemical system (BES). Most previous works have focused on electrode modification, but, this only benefits the microorganisms that directly contact the electrode. The low conductivity of biofilm limits the current density of the BES. In this work, gold nanoparticles (Au-NPs) were successfully fabricated in situ into a Geobacter sulfurreducens biofilm to increase the conductivity. 20 ppm NaAuCl 4 (the precursor) was slowly dropped into the anode chamber at a rate of 1.3 mL/h in a continuous-flow three-electrode BES. The Au(III) was transformed to Au-NPs, which then precipitated in the biofilm via biological mineralization. The current density of the anode increased by 40%. Meanwhile, the removal percentage of the organic substrate (acetate) was enhanced 2.2 times, from 24.7% to 53.3%, after the in situ fabrication of Au-NPs. This method greatly lowered the charge transfer resistance of the anode and enhanced the anodic limiting current. Our results proved that the current density and organic removal rate of the G. sulfurreducens biofilm in the anode were effectively enhanced by in situ Au-NP fabrication. This work not only provides a simple and effective strategy for enhancing the electricity generation of BES with conductive NP fabrication, but also improves the understanding of the extracellular electron transfer (EET) of exoelectrogens.

Hui Li, Bin Wang, Songping Deng et al.

Bioresource Technology • 2019

Introducing oxygen-containing functional groups is a common and convenient method to increase the hydrophilicity of bioelectrodes. In this study, the effect of oxygen-containing functional groups on biofilm was systematically studied to understand how the electron transfer between electrochemically active bacteria (EAB) and bioelectrode was boosted. After electrolysis pretreatment in sulfuric and nitric acid mixture, the oxygen content of the carbon fiber brushes increased from 4.6% to 30.9%. Comparing with the control, the maximum power density increased by 27.7%, while the anode resistance decreased by 21.8%, because charge transfer resistance significantly reduced. The analysis results showed that the content of c-type cytochromes (c-Cyts) in the EAB biofilm was four times higher than that in the control, while the biomass just slightly increased and the bacteria community was similar with that of the control. These findings suggested that the fundamental reason for the enhanced extracellular electron transfer between EAB and electrode was the increased c-Cyts.

Ru Jia, Dongqing Yang, Dake Xu et al.

Corrosion Science • 2018

Gregory P. Krantz, Kilean Lucas, Erica L.- Wunderlich et al.

Biofouling • 2019

Huabing Li, Dake Xu, Yingchao Li et al.

PLOS ONE • 2015

Zheng Zhuang, Guiqin Yang, Qijun Mai et al.

Science of The Total Environment • 2020

Xing Liu, Shiyan Zhuo, Xianyue Jing et al.

Biosensors and Bioelectronics • 2019

S. Kondaveeti, A. Bisht, Raviteja Pagolu et al.

Indian Journal of Microbiology • 2022

The dependency on non-renewable fossil fuels as an energy source has drastically increased global temperatures. Their continuous use poses a great threat to the existing energy reserves. Therefore, the energy sector has taken a turn toward developing eco-friendly, sustainable energy generation by using sustainable lignocellulosic wastes, such as rice straw (RS). For lignocellulosic waste to be utilized as an efficient energy source, it needs to be broken down into less complex forms by pretreatment processes, such as alkaline pretreatment using NaOH. Varied NaOH concentrations (0.5%,1.0%,1.5%,2%) for alkaline pretreatment of RS were used for the holocellulose generation. Amongst the four NaOH concentrations tested, RS-1.5% exhibited higher holocellulose generation of 80.1%, whereas 0.5%, 1 5 and 2% pointed 71.9%, 73.8%, and 78.5% holocellulose generation, respectively. Further, microbial fuel cells (MFCs) were tested for voltage generation by utilizing holocellulose generated from untreated (RS-0%) and mildly alkaline pretreated RS (RS-1.5%) as a feedstock. The MFC voltage and maximum power generation using RS-0% were 194 mV and 167 mW/m 2 , respectively. With RS-1.5%, the voltage and maximum power generation were 556 mV and 583 mW/m 2 , respectively. The power density of RS-1.5% was three-fold higher than that of RS-0%. The increase in MFC power generation suggests that alkaline pretreatment plays a crucial role in enhancing the overall performance.

Ruchika Siwach, Soumyajit Chandra, Amit Kumar et al.

Sustainable Chemistry for the Environment • 2025

Byung-Min An, Yoon Heo, H. Maitlo et al.

Bioresource Technology • 2016

Jaecheul Yu, Younghyun Park, Taeho Lee

Bioprocess and Biosystems Engineering • 2014

Monali Chhatbar, Jain Suransh, A. Mungray et al.

Biomass Conversion and Biorefinery • 2025

P. Surti, S. K. Kailasa, A. K. Mungray

Industrial & Engineering Chemistry Research • 2024

Li Zhuang, Yong Yuan, Guiqin Yang et al.

Electrochemistry Communications • 2012

Edson Baltazar Estrada-Arriaga, Oscar Guadarrama-Pérez, Susana Silva-Martínez et al.

Electrochimica Acta • 2021

Estelle Lebègue, Nazua L. Costa, Ricardo O. Louro et al.

Journal of The Electrochemical Society • 2020

Electrochemical single nano-impacts of electroactive Shewanella oneidensis bacteria at a 7 μ m diameter carbon fibre ultramicroelectrode in an aqueous potassium phosphate buffer (pH = 7.2) solution containing a redox active probe (potassium ferro- or ferricyanide) is reported. We present chronoamperometric measurements recorded at the ultramicroelectrode polarized at the potential of the steady-state current of the redox probe in solution (oxidation for K 4 Fe(CN) 6 or reduction for K 3 Fe(CN) 6 ) in the presence of bacteria. The shape of current transients associated to single bacteria nano-impacts is compared and discussed as a function of the redox probe in solution and of the ultramicroelectrode applied potential.

Lili Wang, Yue Zhou, Qi Min et al.

Journal of Environmental Management • 2024

Christina Engel, Florian Schattenberg, Katrin Dohnt et al.

Frontiers in Bioengineering and Biotechnology • 2019

Xianyue Jing, Shanshan Chen, Xing Liu et al.

SSRN Electronic Journal • 2022

Sandhya Prakash, Samsudeen Naina Mohamed, Kalaichelvi Ponnusamy

Chemical Engineering Journal • 2024

Qingyun Ping, Ibrahim M. Abu-Reesh, Zhen He

Desalination • 2016

Tahereh JAFARY, Saad A. ALJLIL, Javed ALAM et al.

Journal of the Japan Institute of Energy • 2017

Jing Guo, Chuan Cao, Zhenli Wang et al.

Desalination and Water Treatment • 2024

Yan Li, Jordyn Styczynski, Yuankai Huang et al.

Journal of Power Sources • 2017

Srishti Mishra, Gourav D. Bhowmick, Brajesh K. Dubey et al.

Desalination • 2025

Azhar Al Hinai, Tahereh Jafary, Halima Alhimali et al.

Desalination • 2022

Masirah Zahid, Nishit Savla, Soumya Pandit et al.

Desalination • 2022

Yu Kong, Mengni Tao, Xiwu Lu et al.

Desalination and Water Treatment • 2024

Sadik Rahman, Sajjad Ahmad Siddiqi, Abdullah Al-Mamun et al.

Desalination • 2022

Mostafa Ragab, Abdelsalam Elawwad, Hisham Abdel-Halim

Desalination • 2019

Zhongyi An, Huichao Zhang, Qinxue Wen et al.

Desalination • 2014

Raoof Rabiee, Seyed Morteza Zamir, Mahsa Sedighi

Desalination • 2024

Zheng Ge, Carlos G. Dosoretz, Zhen He

Desalination • 2014

Desmond Ato Koomson, Jingyu Huang, Guang Li et al.

SSRN Electronic Journal • 2021

Atieh Ebrahimi, Ghasem D. Najafpour, Daryoush Yousefi Kebria

Desalination • 2018

Qijing Liu, Qinran Ding, Wenliang Xu et al.

Nano Energy • 2023

B. Tartakovsky, P. Mehta, G. Santoyo et al.

International Journal of Hydrogen Energy • 2011